ServiceStack.HttpUtils.PostStringToUrl C# (CSharp) Метод

        public static string PostStringToUrl(this string url, string requestBody = null,
            string contentType = null, string accept = "*/*",
            Action<HttpWebRequest> requestFilter = null, Action<HttpWebResponse> responseFilter = null)
        {
            return SendStringToUrl(url, method: "POST",
                requestBody: requestBody, contentType: contentType,
                accept: accept, requestFilter: requestFilter, responseFilter: responseFilter);
        }